<ul class="list">
   <li class="item" ng-hide="isFirstCard" ng-click="moveTopCard()">置顶</li>
   <li class="item" ng-hide="isFirstCard" ng-click="moveUpCard()">上移</li>
   <li class="item" ng-hide="isLastCard" ng-click="moveDownCard()">下移</li>
   <li class="item" ng-click="removeCard()">移除</li>
</ul>